"use strict";
const arr = [1, 2, 3];
const set = new Set([3, 4, 5]);
const map = new Map();
map.set(1, 3);
map.set(2, 5);
for (let item in arr) {
    console.log(item); // 0 1 2
}
for (let item of arr) {
    console.log(item); // 1 2 3
}
